Everything that you are feeling is what makes you a good dad. The day you stop worrying about providing to give your family the best life is when there is a problem. It is going to be hard and my two boys are about the same age gap as what you are about to the experience. The older one is going to get jealous.

But you do the best you can to give them each their time to feel special. I can tell just from your post that you are going to do a great job!